10 nULLIA. 



T. RUHATA, Ivoeve. PI. 0, fio-. 06. 



Wliitish ov light brown. Length, 1*1 inches. 



Babitat unknown. 

 The pertinence of this species to the genus is very doubtful. 

 I have not seen a specimen of it. 



T. MODESTA, Powis. PI. 5, fig. .57. 



Yellowish, longitudinally strigate or maculate or nearly- 

 covered with chestnut-brown, with a white central band. 



Length, -8-1 inch. 



Panama. 



Quite as closely related to Eulhria as to the type of this 



genus. 



T. SULCATA, Kiener. PI. 5, fig. 58. 



VelloAvish wliite, under a rufous epidermis. Length, 15 mill. 



Habitat unknown. 

 T. EURYTOiDES, Carpenter. 



White, with a revolving series of brown maculations on the 

 l)eriphery ; sometimes the base is brown, or tlie whole surftice 

 brown spotted ; with about twenty longitudinal riblets, becom- 

 ing evanescent towards the apei'ture ; aperture subquadrate, lip 

 scarcely thickened, striate finel}' within, columella abruptly 



truncate. Length, "3 inch. 



Cape St. Lucas, Lower California. 



Has not been figured hitherto, and the specimen before me 



(an author's type) is not in good condition for illustration. 



Very probably tlie species is not a Truncai'ia, txt all; its size 



indicates close relationship with C'olumhella. 



T. TRiFAsciATA, A. Ad. This name is given in the " Genera of 

 Recent Mollusca," but I have not found a description of it. 



(iiniis BULLIA. (iiM.v. 



Animal without eyes ; tentacles long and slender. Foot enor- 

 mously expanded, and bifid behind in the typical species. There 

 is no operculum. 



Bidlia (restricted sense) has a raised l)and of enamel round the 

 sutures of the whorls as in Ancillaria. The animal has the 

 faculty, according to M. Quoy, of absorbing, through the pores of 

 its foot, a great quantity of water, which it ♦'jocts wlion disturbed. 



